static void Main(string[] args)
{
int flag = 1;
int a =0;
int b = 0;
int res = 0;
int i = 0;
int op;
char cont;
string[] operations = new string[] { "Addition", "Subtraction", "Multipliaction", "Division", "Exit" };
while(flag == 1)
{
Console.Clear();
Console.Write("Please enter the operation to be performed :\n");
//Console.Write("\n1) Addition\n2) Subtraction\n3) Multiplication\n4) Division\n5) exit\n\n");
i = 1;
foreach (string option in operations)
{
Console.Write("\n" + i + ") " + option + "\n");
i++;
}
op = Convert.ToInt32(Console.ReadLine());
if(op < 5)
{
Console.Write("\n************************************************************************\n");
Console.Write("Please enter 2 integers \n");
a = Convert.ToInt32(Console.ReadLine());
b = Convert.ToInt32(Console.ReadLine());
}
switch(op)
{
case 1:
Console.Write("\n************************************************************************\n");
Console.Write("Operation to be performed is {0}\n", operations[0]);
Add op1 = new Add();
res = op1.addition(a, b);
break;
case 2:
Console.Write("\n************************************************************************\n");
Console.Write("Operation to be performed is {0}\n", operations[1]);
Sub op2 = new Sub();
res = op2.substraction(a, b);
break;
case 3:
Console.Write("\n************************************************************************\n");
Console.Write("Operation to be performed is {0}\n", operations[2]);
multiply op3 = new multiply();
res = op3.multiplication(a, b);
break;
case 4:
Console.Write("\n************************************************************************\n");
Console.Write("Operation to be performed is {0}\n", operations[3]);
if (b == 0)
{
Console.Write("Division by zero error !!! \n\nPlease enter a non zero value for b \n");
b = Convert.ToInt32(Console.ReadLine());
}
divide op4 = new divide();
res = op4.division(a, b);
break;
case 5:
Console.Write("\n************************************************************************\n");
Console.Write("Operation to be performed is {0}\n", operations[4]);
Environment.Exit(0);
break;
default :
Console.Write("Invalid operation\n");
break;
}
Console.Write("\n************************************************************************\n");
Console.Write("\nResult of the operation is : {0}", res);
Console.Write("\n************************************************************************\n");
Console.Write("\n\nDo you want to continue : Y or N\n");
cont = Convert.ToChar(Console.ReadLine());
if (cont == 'N' || cont == 'n')
flag = 0;
}
}
